The estimation of the size of an animal population is considered for a situation where the population is stratified and only partial mixing takes place between strata. A consistent estimate is found and its variance determined. It is shown that estimates previously given or frequently used in this situation are not necessarily consistent and, in fact, may be meaningless. Conditions for their consistency are determined. Some further statistical problems in estimating the interstrata migration are discussed.
D. G. Chapman. C. O. Junge Jr. "The Estimation of the Size of a Stratified Animal Population." Ann. Math. Statist. 27 (2) 375 - 389, June, 1956. https://doi.org/10.1214/aoms/1177728264